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CSTL

CASTLE BIOSCIENCES INC

NASDAQ · Healthcare · Medical - Diagnostics & Research · US

$32.17
+0.64%
Ask drillr
0
Insider buys (3m)
71
Insider sells (3m)
-$8.3M
Net value (3m)
+34.7%
Price return (3m)
Form 4 filings
DateInsiderActivitySharesPrice
Oct 14, 2026Juvenal Tobin W · officer: Chief Commercial OfficerSale3,288$34
Oct 7, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerM-Exempt8,165$2.39
Oct 7, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale2,718$36
Oct 7, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale8,580$36
Oct 7, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale3,198$36
Oct 5, 2026Oelschlager Kristen M · officer: Chief Operating OfficerM-Exempt4,153$3.38
Oct 5, 2026Oelschlager Kristen M · officer: Chief Operating OfficerSale2,807$36
Oct 5, 2026Oelschlager Kristen M · officer: Chief Operating OfficerSale1,346$36
Oct 1, 2026Juvenal Tobin W · officer: Chief Commercial OfficerSale1,034$34
Oct 1, 2026Juvenal Tobin W · officer: Chief Commercial OfficerSale5,543$35
Sep 23, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale2,718$35
Sep 23, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerM-Exempt8,580$2.39
Sep 23, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale8,580$35
Sep 23, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale3,198$35
Sep 16, 2026Juvenal Tobin W · officer: Chief Commercial OfficerSale3,306$32
Sep 16, 2026Juvenal Tobin W · officer: Chief Commercial OfficerSale3,294$35
Sep 15, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale83$33
Sep 15, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale2,656$32
Sep 15, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerM-Exempt8,584$2.39
Sep 15, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale8,361$32
Sep 15, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale223$33
Sep 15, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale71$33
Sep 15, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale3,124$32
Sep 3, 2026Oelschlager Kristen M · officer: Chief Operating OfficerSale3,952$33
Sep 3, 2026Oelschlager Kristen M · officer: Chief Operating OfficerSale200$34
Sep 3, 2026Oelschlager Kristen M · officer: Chief Operating OfficerM-Exempt4,152$3.38
Sep 2, 2026Juvenal Tobin W · officer: Chief Commercial OfficerSale1,730$33
Sep 1, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerM-Exempt12,428$2.39
Sep 1, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale2,505$33
Sep 1, 2026MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSale11,472$33
Institutional positioning

13F filings over the trailing two quarters

New 56Increased 152Reduced 118Sold out 31
FilerActionSharesFiled
BlackRock, Inc.Increased3,291,963Aug 7, 2026
BLACKROCK, INC.Reduced2,982,946May 13, 2026
RTW INVESTMENTS, LPIncreased2,778,335Aug 14, 2026
RTW INVESTMENTS, LPIncreased2,758,335May 15, 2026
PRINCIPAL FINANCIAL GROUP INCReduced1,769,877May 4, 2026
PRINCIPAL FINANCIAL GROUP INCReduced1,726,648Aug 4, 2026
PORTOLAN CAPITAL MANAGEMENT, LLCReduced1,350,283May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCIncreased1,226,497Aug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position1,177,522May 15, 2026
DIMENSIONAL FUND ADVISORS LPReduced1,039,761May 7, 2026
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLCReduced940,685May 15, 2026
ACADIAN ASSET MANAGEMENT LLCIncreased918,668Aug 13, 2026
Allianz Asset Management GmbHIncreased879,258Sep 2, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position861,771May 8, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCReduced840,785Aug 13, 2026

Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Oct 14, 2026